How do you put a youtube video in your topic?

[Chêvouÿx]

I was wondering... how do you put a youtube video on a forum?

Blank did it here: http://www.zombiemurder.com/forum/showthread.php?t=4897

How!?!?!

[Lemmings19]

[youtube ]a9qXbgrx9rg[/youtube ]

What you put between [youtube ] and [/youtube ] is whatever 
is in the youtube URL past the equal = sign.
http://youtube.com/watch?v=a9qXbgrx9rg

For some reason, even though it's in the code box, it won't display
the [youtube ] [/youtube ] without me putting a space at the end
of each one. Don't put a space in after "youtube" in the coding
when you go to make an embedded youtube video, I am only doing
that so it will show without creating a video.

If you go to quote this post of mine, you can check the "A/A" box at the top right when you go to post, and you will see all of the coding in my post. When you do that, check to see how I embedded the following random video if you still aren't sure how it works.

[PotshotPolka]

lol.... Fucking Goddamn Lag!